Multilayer ceramic capacitor

Abstract

In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 μm or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.

What is claimed is: 
     
       1. A multilayer ceramic capacitor comprising:
 a multilayer body including:
 a plurality of ceramic layers laminated therein; 
 a first main surface and a second main surface opposed to each other in a height direction; 
 a first side surface and a second side surface opposed to each other in a width direction orthogonal or substantially orthogonal to the height direction; 
 a first end surface and a second end surface opposed to each other in a length direction orthogonal or substantially orthogonal to the height direction and the width direction; 
 first internal electrode layers alternately laminated with the plurality of ceramic layers therein and exposed at the first end surface; and 
 second internal electrode layers alternately laminated with the plurality of ceramic layers therein and exposed at the second end surface; 
 
 a first external electrode on the first end surface; and 
 a second external electrode on the second end surface; wherein 
 a ratio of a number of the first internal electrodes and the second internal electrodes which are not connected to any of the first external electrode and the second external electrode in a cross section in the length direction and the height direction at a middle portion in the width direction to a number of the first internal electrodes and the second internal electrodes which are connected to any of the first external electrode and the second external electrode is about 10% or less. 
 
     
     
       2. The multilayer ceramic capacitor according to  claim 1 , wherein a distance between end portions in the width direction of the first internal electrode layers and the second internal electrode layers adjacent to each other in the height direction is about 5 μm or less. 
     
     
       3. The multilayer ceramic capacitor according to  claim 2 , wherein a ratio of a number of the first internal electrodes and the second internal electrodes which are not connected to any of the first external electrode and the second external electrode in a cross section in the length direction and the height direction at an end portion in the width direction to a number of the first internal electrodes and the second internal electrodes which are connected to any of the first external electrode and the second external electrode is about 10% or less. 
     
     
       4. The multilayer ceramic capacitor according to  claim 3 , wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less. 
     
     
       5. The multilayer ceramic capacitor according to  claim 2 , wherein a metal included in the first internal electrode layers and the second internal electrode layers is included in a higher density on a side adjacent to the first internal electrode layers of the first external electrode and on a side adjacent to the second internal electrode layers of the second external electrode, than a portion other than the side adjacent to the first internal electrode layers of the first external electrode and a portion other than the side adjacent to the second internal electrode layers of the second external electrode. 
     
     
       6. The multilayer ceramic capacitor according to  claim 2 , wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less. 
     
     
       7. The multilayer ceramic capacitor according to  claim 1 , wherein a ratio of a number of the first internal electrodes and the second internal electrodes which are not connected to any of the first external electrode and the second external electrode in a cross section in the length direction and the height direction at an end portion in the width direction to a number of the first internal electrodes and the second internal electrodes which are connected to any of the first external electrode and the second external electrode is about 10% or less. 
     
     
       8. The multilayer ceramic capacitor according to  claim 7 , wherein a metal included in the first internal electrode layers and the second internal electrode layers is included in a higher density on a side adjacent to the first internal electrode layers of the first external electrode and on a side adjacent to the second internal electrode layers of the second external electrode, than a portion other than the side adjacent to the first internal electrode layers of the first external electrode and a portion other than the side adjacent to the second internal electrode layers of the second external electrode. 
     
     
       9. The multilayer ceramic capacitor according to  claim 7 , wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less. 
     
     
       10. The multilayer ceramic capacitor according to  claim 1 , wherein a metal included in the first internal electrode layers and the second internal electrode layers is included in a higher density on a side adjacent to the first internal electrode layers of the first external electrode and on a side adjacent to the second internal electrode layers of the second external electrode, than a portion other than the side adjacent to the first internal electrode layers of the first external electrode and a portion other than the side adjacent to the second internal electrode layers of the second external electrode. 
     
     
       11. The multilayer ceramic capacitor according to  claim 1 , wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less.